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<p>The <code>gpsd</code> project has neither corporate sponsorship nor
a budget; it relies on donations of development time and hardware.  If
we're very lucky, we may someday get some help from our
(so far, nonexistent) Google ad revenues.</p>

<p>Because actual hardware is involved, it's all too easy to spend a
lot of money keeping up with new technologies. A single version of a
technical standard might cost $100, an OEM board or consumer receiver
might be another $100 and full evaluation kits can range between $500
and $5000.</p>

<p><b>You can help by donating money or hardware.</b>  The hardware table
below lists the GPSes we'd like to be able to test with regularly.  Where
there are initials in the table, we have what we need in a developer's
hands.  The blank spaces need to be filled in.</p>

<p>An "Evaluation kit" is what GPS manufacturers sell people who
are going to do serious development with their products.  It includes
access to their documentation, something they often make unreasonably
difficult for anyone who doesn't buy the kit.</p>

<p>The entire kit we presently need would probably cost about $25K,
with maybe $5000 per annum enough to cover the most important new
evaluation kits that come out each year.  <b>But we could make
excellent use of much smaller donations</b> &mdash; in 2006,
consumer-grade GPS mice tend to cost $60 to $80 each, and the more
different varieties of those we can test early, the less likely users
are to run into a problem later.</p>

<p>An effective way to contribute, if you are thinking of buying one
of the GPSes we don't have, is to <b>buy two of them and send us one</b>.
That way you can be effectively certain that <code>gpsd</code> will
fully support it. If you're not sure about what's in a receiver, or
want help picking one we don't yet support, just ask us.</p>

<div>&nbsp;</div>

<br>
<table style="border:1px;">
  <tbody>
    <tr style="text-align:center">
      <td colspan="3" rowspan="1" style="vertical-align:top"><b>Hardware</b></td>
    </tr>
    <tr>
      <td style="vertical-align:top"><em>Receiver type</em></td>
      <td style="text-align:center;vertical-align:top"><em>Evaluation kit</em></td>
      <td style="text-align:center;vertical-align:top"><em>Retail or OEM product</em></td>
    </tr>
    <tr>
      <td style="vertical-align:top">Garmin</td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">gem, jf</td>
    </tr>
    <tr>
      <td style="vertical-align:top">Hemisphere <a href="https://hemispheregnss.com/Products">Crescent</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top"><a href="https://hemispheregnss.com/Products">OEM Module</a></td>
    </tr>
    <tr>
      <td style="vertical-align:top">Javad JNScore</td>
      <td style="text-align:center;vertical-align:top"><a href="https://www.javad.com/jns/products/LGG100.html">JGG100</a></td>
      <td style="text-align:center;vertical-align:top"><a href="https://www.javad.com/jns/products/JNS100.html">JNS100</a></td>
    </tr>
    <tr>
      <td style="vertical-align:top">Javad Triumph</td>
      <td style="text-align:center;vertical-align:top"><a href="https://www.javad.com/jgnss/products/receivers/triumph-1.html">Triumph-1</a></td>
      <td style="text-align:center;vertical-align:top"><a href="https://www.javad.com/jgnss/products/oem/TR-G3T/specifications.html">OEM</a></td>
    </tr>
    <tr>
      <td style="vertical-align:top">Novatel <a href="https://docs.novatel.com/OEM7/Content/Home.htm">OEM7</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top">Septentrio <a href="https://www.septentrio.com/products/gnss-receivers/rover-base-receivers/oem-receiver-boards/asterx">AsteRx-i S</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top">Trimble <a href="http://www.trimble.com/timing/mini-t.aspx">Mini-T</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top">Trimble <a href="http://www.trimble.com/timing/resolution-t.aspx">Resolution-T</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top">Trimble <a href="http://www.trimble.com/timing/thunderbolt-e.aspx">Thunderbolt</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">csk</td>
    </tr>
    <tr>
      <td style="vertical-align:top">TrueNorth <a href="https://www.tntc.com/revolution/">Revolution</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top">u-blox <a href="https://www.u-blox.com/en/product/neolea-6t">Antaris4-T</a></td>
      <td style="text-align:center;vertical-align:top">csk</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
  </tbody>
</table>

<div>&nbsp;</div>

<p>Unlike Internet standards, which are commonly available on-line and
often freely redistributable, GPS standards tend to be expensive paper
documents issued under restrictive terms.  We link to the ones
available on-line from on our <a href='references.html'>References</a>
page; we don't have copies of most of the paper ones.</p>

<p>Where there are version numbers in the table below, at least one
GPSD core developer has that version of the standard.  The blank
spaces need to be filled in. Links go to where that standard can be
purchased.</p>

<div>&nbsp;</div>

<div>
<table style="border:1px;">
  <tbody>
    <tr style="text-align:center">
      <th colspan="3" rowspan="1" style="vertical-align:top">Documentation</th>
    </tr>
    <tr>
      <td style="vertical-align:top"><em>Document</em></td>
      <td style="text-align:center;vertical-align:top"><em>Single Version</em></td>
      <td style="text-align:center;vertical-align:top"><em>Update Subscription</em></td>
    </tr>
    <tr>
      <td style="vertical-align:top"><a href='https://www.nmea.org/content/STANDARDS/NMEA_0183_Standard'>NMEA 0183</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top"><a href='https://www.nmea.org/content/STANDARDS/NMEA_2000'>NMEA 2000</a></td>
      <td style="text-align:center;vertical-align:top">-</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top"><a href='https://www.rtcm.org/publications'>NTRIP</a></td>
      <td style="text-align:center;vertical-align:top">10410.1</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top"><a href='https://www.rtcm.org/publications'>RTCM</a></td>
      <td style="text-align:center;vertical-align:top">10402.3, 10403.3</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
    <tr>
      <td style="vertical-align:top"><a href='https://kb.igs.org/hc/en-us/articles/201096516-IGS-Formats'>RINEX</a></td>
      <td style="text-align:center;vertical-align:top">2.11, 3.04</td>
      <td style="text-align:center;vertical-align:top">-</td>
    </tr>
  </tbody>
</table>
<br>

<p>All our software is <b>free and available to everyone</b>.  Please
help us get the standards and test hardware we need so we can do a better
job on behalf of everyone.</p>

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